Goal: Install the Cline extension in Trae, then connect a model through the LLM API Gateway's OpenAI-compatible endpoint. The setup is nearly identical to VS Code.

Setting	Value	Notes
API Provider	OpenAI Compatible	Choose a provider that accepts a custom Base URL.
Base URL	`https://api.llm-token.cn/v1`	Do not enter a full API endpoint.
API Key	`sk-xxxxxxxx`	Copy the complete Key.
Model ID	Complete model ID from the model list	Start with a fast model for your first test.

1. Prerequisites

Install Trae: https://trae.cn/
Install Git: https://git-scm.com/downloads
Windows users should restart the computer after installing Git.

2. Install the Cline Extension

Open Trae and select Extensions in the left sidebar.
Search for Cline and install it.
Restart Trae after installation to ensure the extension loads.

Trae extension marketplace with cline entered in the search field and ma…

If the extension is missing: Trae supports extension management. If the extension is unavailable in its store, follow the Trae extension documentation to download a VSIX from the VS Code Marketplace and install it manually.

3. Open Cline Settings

Select the Cline icon in the left sidebar to open its settings.

Cline onboarding screen asking how to use Cline, with Absolutely Free, F…

4. Configure the API

API Provider: Select OpenAI Compatible.
Base URL: Enter https://api.llm-token.cn/v1.
API Key: Paste your complete Key.
Model ID: Enter the complete model ID.
Click Done / Save to save the configuration.

Trae Cline API Configuration screen with Act Mode selected, OpenAI Compa…

5. Verification and Troubleshooting

Symptom	Resolution
Configuration succeeds	You can select the model and start a chat or coding request.
Cannot enter a URL	Confirm that Cline is installed and API Provider is set to OpenAI Compatible.
Connection fails	Check the Base URL, API Key, network proxy, and model ID.
Model unavailable	Copy the complete model name from the model list and paste it again.

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Trae Setup Guide